Round turn and two half hitches
Ties a mooring line to a ring, a mooring stake, a dolly or a bollard, and still comes undone with the boat pulling on it.

Use it on: Bollard, Mooring stake, Dolly, Ring.
- Pass the end of the line round the bollard, stake or dolly, or through the ring, so it comes back towards you.
- Take it round once more. The line now wraps the post twice: that is the round turn, and it holds the boat while you tie the rest.
- Take the end over the standing part (the length that runs to the boat), round it, and back through between itself and the round turn. That is the first half hitch. Pull it snug.
- Go round the standing part again, the same way, and tuck the end through between itself and the first hitch. That is the second half hitch. Pull everything tight.
To undo it: Pull the end back out of the two half hitches. The round turn still holds the boat, and you can ease the line round the post to let her go gently.
Steps in our words, from Colin Jarman on Living on a Narrowboat and Animated Knots by Grog.



